Extension-table slide



H. N. SMITH.

EXTENSION TABLE SLIDE.

APPLICATION FILED JULY 26,192l. 19422? 142 Patented; July H, 1922.

2 SHEETS-SHEET 1.

H. N. SMITH.

EXTENSION TABLE SLIDE. APPLICATION FILED IuLY 2s, I92I.

Lz, 142. Patented July u, 1922;.

' a #y 2 SHEETS-SHEET 2;

@www

naiss vaaste;si

maar

IIARRYVN. SMITH, er wl'rris'n'TownA WISCONSIN, assIeNon uio uAT'iiaTiovN T ABLE SLIDE COMPANY, or WATERTOWN, WIsCoNsIN, A CORPORATION or WISCONSIN.

EXTENsIoN-TAB Shinn.

T0 'all whom t may concer/n: f

Be it known that I, HARRY N. SMITI-I, a citizen of the United States, and resident of Watertown,- in the county of Jefferson and State of lVisconsin, have invented certain newland useful improvements in Extension Table Slides; and I do hereby declare that thefollowing is a full, clear, and eXact descri tion thereof. o

hffly invention refers to extension tables, andl particularly to the interlocking bearing blocks for the slide-bars thereof, for eX- ample, as desciibe'd in U. S. Letters Patent No. 626,747, dated June 13, 1899.

The primary Object of my invention is to provide meansfor Overcoming the tend ency of the slide-bars to sag in eit-her what is known as the center support type of table, or :the end support type. y

In practice ity has been found that under ordinary conditions, where the slidebars are supported at the center, the end or floating slide-bars associated therewith, have a tendency to sag' downward, whereby an arc is developed from end to end of the table surface,thereby causing the leaves or fillers to break at their joints and produce an uneven surface, which'is not only unsightly, but uneven. A l A Under the same conditions, ,when the table is supported at its ends, the floating unsupported intermediate slide-bars will tend to sag' downwardly, thereby producing a concave surface from end to end of the table for the support of the leaves, whereby the leaves willv bind and in the aggregate`l develop a series of planes upon slightly dif-- ferent angles. v vIy invention is, therefore, primarily designed to overcome the tendency for the Aleaves to assume a conv'explane, or a concave plane with respectt their upper surfaces, and to prevent dragging contact of ghe leaves upon the top l'surface f the slidears. y In solving vthe problem, as sett-forth above, the specific object of iny invention isv to provide a standard interlocking bearing block, having a high bearing face and a low bear"- ing face, said faces being selectively re'- versib'le in construeting the table, depending upon whether the saine' is `of the center pecincatiii of Letters IP'atent.

Patented July f1, 1295225'. iai. sii No; 487,664.

support type 'Or the -end support type. Heretefore', standard bearing bl'o'eks, such as described in the prior patent referred to, have been provided with shoe portions, which serve as bearing surfaces for the juxtaposed slide,rthe said bearing surfaces being approximately equal distances from an imaginary center line passing through the block, and hence, when the said blocks were glued in or otherwise anchored, as to become in effect, a perinanent part of one of the slides, the bearing surfaces being relatively fixed, would necessarily permit a certain amount 'of play, for the' shiftable slide-bar supported thereby, andthis play will bviou'sly pei"- niit a certain amount of vertical play of the 'shiftable slidefbar, whereby the sag previou'slyfnientioned is developed.

My invention, therefore, providesV the upper and lower parallel bearing surfaces ofthe shoe extension of the block, at fdifferent Vdistances from the center of the shoe, whereby reversal of the Vblock is effected, when the table slide structure is assembled, to thus compensate for this sag in the table. to which they will thereafter be applied, and the reversal seleetidn whereby the high or low 'bearing surface' is psition'ed up o'r down depends upon the type of table under Yconstruction.

In the drawings, Y

Figure l represents a diagrammatical side elevation of an Aend supported table, 'ein- -bodying the features of my invention.

Figure 2, a fragmentary sectional plan -view of the series of slide-bars employed in connection with constructing a table.

Figure 3 is a similar diagrammatical side elevation of a center sup'l'aorting table, embodying the features, of my invention.

vFigure 4, a. detailed enlarged cross sectional view of the fragment of an end supportedtable, such asillustrated inFigure l, the slide-bars being illustrated in their closed position. L Y y Figure 5 isa similar enlarged cross sectional view of a fragment of a. center supported table, and y y vFigure 6, an, enlarged detail cross sectional view of an interlocking` bearing block, embodying the features of my invention, wherein the shoe portion thereof, is

Y tion.

' the reversible blocks having the shoe extenformed with reversible high and low bearing faces for the support of an associated shiftable slide-bar.

Referring by characters to the drawings, especial reference to the Figures 1, 2 and 4l, A-A represents end supported'slidebars of standard type for the reception of the usual table leaves, it being understood that the supported legs a may be of any suitable type. The supported slide-bars A-AVl have T-shaped grooves of the usual type, wherein shoe bearing surfaces Z) are formed at their upper and lower edges. The inner ends of said slide-bars have fitted within the T-shaped'grooves and rigidly secured thereto, blocks 1-1, which blocks have shoe extensions 2 that serve as bearings for a floating slide-bar B, it being understood that the floating slide-bar upon its opposite faces is providedV withr T-shaped rooves having bearing edges, similar to t e bearing edges mentioned in connection with the end slide-bars, which bearing edges engage the bearing surfaces of the shoe eX- tension of the blocks 1 1. Each groove of the floating slide-bar B, also has secured therein, at opposite ends, a block 3, the shoe extension of which one of the blocks engages the bearing surface b of the slide A, while the corresponding shoe extension engages bearing surfaces b-Z) of the groove formed in the slide-bar A.

All of the above construction forms no part of my present invention, however, and it is understood that the sliding bars in addition to the shoe extensions, which serve as surface supports for `the shiftable'bars, also carry metallic dished washers d which enter the base of the T-shaped grooves, to thereby lock the slide-bars against separation in a lateral direction.

In the end type of the table just described, it will be noted that the tendency of the center or floating slide B is to sag downwardly, under load and that the tendency of the end slides supported upon their legs a will also tend to rock downwardly in the saine direc- IIence, in order to overcome this sag,

sion, are secured to their respective slidebars, so as to bring the high bearing surface X, see Fig. 6, against the bottom edge b of the T-shaped grooves and, by so doing when the slides are distended, they will practicallyassume a straight line in place of the sag Vpreviously mentioned, due to the fact, that this eXtra depth of support, formed by the bearing surfaces X of the shoe, will prevent the sagging of the 'parts and sustain them in their normal horizontal plane.

Referring now more particularly to Figures 3Vv and .5, a represents the center supporting leg.

In this exemplification of my invention, the center slide B is fixed, and the details of construction with respect to this slide and the floating end slides A, A" are similar to the structuredescribed in connection with Figure 1, with the exception that the-center support reverses the type of extension table, whereby the end slides have a tendency to sag downwardly and, in supporting the extension leaves, they will assume conveXity, in place of a concavity developed Vin that type of table illustrated in Figure 1 of the drawing. To overcome the conveXity or end sag, mentioned in connection with the center supported table, the blocks are reversed so as to bring their high bearing surfaces w above, in place of being below, as in the other case. Hence, when thesehigh bearing surfaces are in position, as indicated in .Figure 1, the tendencyof the end slides to sag will'be overcome and the table top will assume a normal horizontal plane. Inother words, all that is necessary to correct the tendency to sag in the two types of tables, is to reverse the position of the bearing surface of the blocks, whereby their high surfaces 'will eitherform bearings for the upper edges of the grooves as shown in Fig. 3, or the lower edges as shown in Fig. 1.

It is understood, as best illustrated in Figure 6, that said bearing blocks are each formed witha high bearing surface :c and a low or clearance bearing surface g/ which bearing surfaces in connection with the shoe heretofore have been spaced equal distances from an imaginary line intersecting the center of the block.

I claim: Y

Y 1. The combination of slide-bars having longitudinal recesses therein, and a block having an upper surface, a second surface, spaced lower than said first mentioned upper surface, a? lower 'surface spaced below e ioo said second upper surface, and a second Y lower surfacespaced below said 'first mentioned upper surface, the distances between said upper surfaces ,being unequal to the distances between said lower surfaces, and said slide-bars receiving said block inY said recesses and contacting with said surfaces.

2. The combination of slide-bars having longitudinal recesses therein, and a block having an upper surface, a second surface,

spaced lower than said first mentioned up- A.

per surface, a lower surface'spaced below said second upper surface, and Va second .lower surface spaced below said first mentioned upper surface, the distances between said upper surfaces being unequal to the dis- ,Y tances Vbetween said lower surfaces, said slide-bars receiving said block'in saidV recesses and contacting with said surfaces, said Y block being reversible to alter the level ofV said slide-bars.

a The @DitmaalA of Sine-bars having longitudinal recesses therein, and a block having an upper surface, a second upper said block being reversible to alter the level l0 of said slide-bars, and means for securing said block to one of said slide-bars.

In testimony that I claim the foregoing I have hereunto set my hand at Watertown, in

the county of Jefferson and State of Wis- 15 consin.

HARRY N. SMITH. 

